Bug in `rpy2q` function

[Adrian Sochaniwsky]

Hi, in the rpy2q function, the documentation uses the order roll, pitch, yaw.

ahrs/ahrs/common/orientation.py

Line 761 in 48ed893

         roll-pitch-yaw angles. 

However, the function unpacks the array as yaw, pitch, roll.

ahrs/ahrs/common/orientation.py

Line 776 in 48ed893

 yaw, pitch, roll = angles 

This is confusing, either the documentation should be updated, or the function should be

roll, pitch, yaw = angles